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It can't be DNS.
It can't be DNS.
It's DNS.
-set the DNS interface to be IPv4 only; remove all other interfaces.
-be sure the interface is set to DOMAIN/PRIVATE.
In short, check DNS and make sure the bindings are only on the IPv4 Interface. Remove the other IP Interfaces like the IPv6 and the "Remote NDIS Compatible Device." Again, YMMV as the IPv6 might be needed in the environment.
Also set the interface to DOMAIN/PRIVATE. For whatever reason, the Network Location Awareness service starts too early and set the location to PUBLIC. You can set to PRIVATE through:
get-netconnectionprofile |set-netconnectionprofile -networklocation PRIVATE
As well as set the NLA service to be a dependency on the DNS and NTDS:
sc config nlasvc depend=NSI/RpcSs/TcpIp/Dhcp/Eventlog/DNS/NTDS
In reality, the problem could be many items in the network configuration. But in this case, the vPC on the Cisco Nexus ToR switches wasn't create correctly and the NIC Team wasn't created correctly on the Windows Server. So when I created the NIC Team, it enabled DNS respondes on all the new IP Addresses/Interfaces of that NIC Team as well as other adapters. So I set DNS to only respond on the IPv4 interface and disabled the others. I went so far as to remove IPv6 altogther with:
Disable-NetAdapterBinding –InterfaceAlias “Ethernet Interface Name Here” –ComponentID ms_tcpip6
When DNS was set to only the IPv4 interface, it took a few minutes for everything to sort itself out but it finally settled down and hummed along nicely afterwards.